It seems to be standard procedure nowadays that if an inconvenient fact arises, well, just deny it. Call it a myth and get a zillion people on the internet to support you. However:
Wikipedia:"Hitler followed a vegetarian diet. At social events he sometimes gave graphic accounts of the slaughter of animals in an effort to make his dinner guests shun meat. A fear of cancer (from which his mother died) is the most widely cited reason for Hitler's dietary habits. An antivivisectionist, Hitler may have followed his selective diet out of a profound concern for animals. Martin Bormann had a greenhouse constructed near the Berghof (near Berchtesgaden) to ensure a steady supply of fresh fruit and vegetables for Hitler throughout the war. Hitler despised alcohol and was a non-smoker. He promoted aggressive anti-smoking campaigns throughout Germany. "
From The Medical Casebook of Adolf Hitler, by Leonard and Renate Heston:
What he did do about his illness was entirely in character: he treated himself. Gradually, he adopted an eccentric diet that was nearly vegetarian. Guided, no doubt, by the effects of particular foods on his pain, he eliminated rich pastries and meat and continued to eliminate foods until his basic diet was vegetables and cereal--a major change for a man who had a reputation as a lover of cakes and sweets. 'Even bread and butter gave him trouble. Zwieback, honey, mushrooms, curds, and yogurt became his standard diet.' At times, even milk products were eliminated and some vegetables, especially cabbage and beans, were also troublesome. Though occasionally he lapsed and would again try the rich foods he previously had enjoyed, Hitler generally followed a very stringent diet from the middle 1930s on.
In a 1938 magazine article published in the UK, Ignatius Phayre wrote:
A life-long vegetarian at table, Hitler's kitchen plots are both varied and heavy in produce. Even in his meatless diet Hitler is something of a gourmet--as Sir John Simon and Anthony Eden were surprised to note when they dined with him in the Presidential Palace at Berlin. His Bavarian chef, Herr Kannenberg, contrives an imposing array of vegetarian dishes, savoury and rich, pleasing to the eye as well as to the palate, and all conforming to the diatetic standards which Hitler exacts.
Boria Sax has some interesting things to say in her book "Animals In The Third Reich: Pets, Scapegoats, and the Holocaust"
'Hitler was a vegetarian, probably in emulation of the composer Richard Wagner,' Boria Sax asserts, but claims, as vegetarian historian Rynn Berry and others have documented, that 'Hitler was probably not entirely consistent in his vegetarianism.'
Adds Sax, 'Several leading figures in the [Nazi] government followed Hilter's example, including [Rudolph] Hess and [Joseph] Goebbels; Heinrich Himmler, who was influenced by Buddhism, even mandated vegetarian meals for leaders of the SS. It is true that the Nazi leaders never tried to promote vegetarianism beyond the ruling circles,' Sax allows. 'An entry in Goebbels' diary dated April 26, 1942 stated that this omission was dictated by necessity. According to Goebbels, Hitler was more deeply convinced than ever that eating meat was wrong, but Hitler could not revolutionize food production while the war was in progress.'
YIKES influenced by Buddhism? My that is an inconvenient fact, but I'm not going to deny it, nor am I going to deny the Holocaust, Global Warming or the radically anti feminist attitudes of most of my ancestors. Hitler's vegetarianism is hugely documented, by friends, enemies and neutral parties, by contemporaries and later historians, and attempting to deny it is just an indulgence in self righteousness.
Sergeant Schultz knew everything there was to know.